One type of cages used to obtain emergence records of cone insects. Ashland, Oregon. Photo by: J.E. Patterson Date: May 1916 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Fo More
Western pine beetle insect cage on ponderosa pine. Type of muslin cage erected about the base of healthy yellow pine tree to force attack of western pine beetle. Bark infested by the beetles placed inside the c More